ReS₂ has been considered as an emerging transition metal dichalcogenides (TMDs) material for sodium-ion batteries (SIBs). However, its electrochemical performance is severely limited by the structural aggregation and damage during deep charge-discharge. Here, a new 1D TiO₂@ReS₂ core-shell structure is reported for boosting the stable performance as the TiO₂ has durable structural stability. The 1D TiO₂ nanotubes with rough surface and large surface area are helpful to grow few-layer (≤4 layers) ReS₂ nanosheets onto their surface. In the obtained 1D TiO₂ [email protected]₂ nanosheet (1D TiO₂[email protected]₂-NS) core-shell heterostructures, the exposed ultrathin ReS₂ nanosheets offer high contact area for rapid Na⁺ diffusion, whilst the TiO₂ nanotubes work as robust backbone for accommodating volume change and strain. Moreover, the chemical interfacial interaction between TiO₂ and ReS₂ gives rise to favorable synergistic effect, leading to enhanced electrical conductivity, Na⁺ diffusion kinetics, and structural stability at both electrode and materials levels. These findings can be supported by various characterization technologies such as X-ray photoelectron spectrum and high-resolution transmission electron microscopy. As a result, the 1D TiO₂[email protected]₂-NS electrode displays a desirable long-life span cycling performance of 118 mAh g⁻¹ at 1 A g⁻¹ after 1000 cycles in sodium-ion batteries. This work not only reports a stable SIBs anode material, but also provides fundamental understanding for designing and fabricating electrode materials for alkali metal ion batteries.

ReS ₂已被认为是用于钠离子电池（SIB）的新兴过渡金属二卤化金属（TMDs）材料。然而，其电化学性能受到深度充放电期间的结构聚集和破坏的严重限制。在这里，由于TiO ₂具有持久的结构稳定性，据报道，一种新的一维TiO ₂ @ReS ₂核-壳结构可提高稳定性能。具有粗糙表面和大表面积的一维TiO ₂纳米管有助于在其表面上生长几层（≤4层）ReS ₂纳米片。在获得的1D TiO ₂ [电子邮件保护] ₂纳米片中（1D TiO ₂[受电子邮件保护] ₂ -NS）核-壳异质结构，暴露的超薄ReS ₂纳米片提供了高接触面积，可实现快速的Na ⁺扩散，而TiO ₂纳米管则是适应体积变化和应变的坚固骨架。此外，TiO ₂和ReS ₂之间的化学界面相互作用产生了良好的协同效应，从而提高了电导率Na ⁺电极和材料层面的扩散动力学和结构稳定性。这些发现可以得到各种表征技术的支持，例如X射线光电子能谱和高分辨率透射电子显微镜。结果，在钠离子电池中经过1000次循环后，1D TiO ₂ [受电子邮件保护] ₂ -NS电极在1 A g ^-1下显示出118 mAh g ^-1的理想长寿命循环性能。这项工作不仅报告了稳定的SIBs阳极材料，而且为碱金属离子电池的电极材料的设计和制造提供了基础知识。